Daniel's Physics Test

Know how to find current or power

Formula - I = power (watts) divided by voltage

Know how to find the strength of a magnetic field!!!! Please be ready for this (You got them wrong on your quiz, don't get them wrong again)

Formula - S2 (D2) squared over (D1) squared

Know how to use Ohm's law to determine the current in the circuit.

Formula: I = V over R (Volts divided by ohms)

True statements

Positively charged objects attract negatively charged objects. Positively charged objects attract neutral objects. Negatively charged objects attract neutral objects.

A large electrostatic generator

Van de Graaff generator

In which of the following circumstances would a current register on the galvanometer?

a magnet being pushed through a solenoid a magnet being pulled out of a solenoid

The element in an incandescent light bulb that releases light energy

a thin tungsten filament

What is the current supply from generativo plants doing?

alternating current.

Why does ocean water conduct electrical current?

because it contains electrolytes

How did the Greeks study charges?

by using amber

A positively charged atom or group of atoms

cation

What are the magnetic fields of Earth and several other planeta produced by?

conductive materials in motion

factors that influence the electrical resistance of a circuit

conductivity of the material length of conducting wires diameter of conducting wires

Why is the earth's magnetic field most likely to be overburdened?

due to a solar flare

Know how to find the strength of source

formula: (distance to pi) squared over (distance to q) squared

What kind of transmission lines does the electricity that is delivered to our homes from regional generating stations move over?

high voltage and low current

What could happen if the Earth's magnetic field is overwhelmed by charged ions?

induced currents in power grids extreme auroras damage to satellites

The unit of resistance

ohms

What does ampere show?

that parallel wires carrying current in the same direction would attract each other.

What happens as more resistors are added to a paralelo circuit?

the current increases

What happens when you turn on the television?

the electrical circuit closes

What happens when the outer electrons of substances are remover?

they become statically charged

In a circuit, what is a battery used for?

to raise the potential of electrons

The unit of electric potential or electromotive force

volt